1B. Percentage of patients by COVID-19 symptom severity score in each treatment group. COVID-19 symptom severity defined as a 5-level score: 0 “asymptomatic”; 1: “mild disease” (no fever, no dyspnea, resolving in <7 days, resembling a common cold); 2: “moderate disease” (some fever and/or cough, or other lower respiratory symptoms, resolving at home in 7-14 days); 3: “severe disease” (pneumonia, required hospitalization, but resolved without intubation); 4-5: “very severe disease” (required hospitalization, intubation, and other supportive measures) or “fatal.”